S/PRO ALPHA C BOA 100

Availability: Many in stock

$194.98 $649.95 (-70%)

Color: Black / Dark Grey Met. / Silver Met. Black / Dark Grey Met. / Silver Met.

Size: 24/24.5 24/24.5 25/25.5 26/26.5 27/27.5 28/28.5 29/29.5 30/30.5

size

Size & Fit Guide

Salomon Size Chart

Name: S/PRO ALPHA C BOA 100
Brand: Salomon
Price: 194.98 USD
Availability: InStock

Footwear, apparel, ski and snow sizing for men, women and kids. Salomon builds on the French Paris-point system, so EU sizes appear as fractions such as 40 2/3 — sizing by foot length in centimetres is always the most reliable match.

Women's Footwear EU 36 – 45 1/3

Measure your foot length and match it to the centimetre column. Men's and women's sizes are not direct conversions.

Trail, Road, Hiking & Lifestyle Shoes
US Women's	UK	EU	Foot Lengthcm	Foot Lengthin
5	3.5	36	21.5	8.5
5.5	4	36 2/3	22	8.7
6	4.5	37 1/3	22.5	8.9
6.5	5	38	23	9.1
7	5.5	38 2/3	23.5	9.3
7.5	6	39 1/3	24	9.4
8	6.5	40	24.5	9.6
8.5	7	40 2/3	25	9.8
9	7.5	41 1/3	25.5	10
9.5	8	42	26	10.2
10	8.5	42 2/3	26.5	10.4
10.5	9	43 1/3	27	10.6
11	9.5	44	27.5	10.8
11.5	10	44 2/3	28	11
12	10.5	45 1/3	28.5	11.2

Women's Tops, Jackets & Midlayers

Body measurements. Measure over the base layer you plan to wear underneath.

Shirts, Tees, Fleece & Shells
Size	Chestin / cm	Waistin / cm	Hipin / cm	Sleevein / cm
XS	32–3481–86	25–2863–70	34–3786–94	3076
S	34–3686–91	28–3070–75	37–3994–99	3177.5
M	36–3891–96	30–3175–80	39–4199–104	3179
L	38–4096–102	31–3480–86	41–43104–110	3281
XL	40–43102–110	34–3786–94	43–46110–118	3383
XXL	43–46110–118	37–4094–102	46–50118–126	3385

Women's Pants, Tights & Shorts

Inseam is measured along the inside of the leg from the crotch to the hem.

Trail Pants, Running Tights & Shorts
Size	Numeric	Waistin / cm	Hipin / cm	Inseamin / cm
XS	2	24–2762–68	34–3686–92	29.976
S	4–6	27–2968–74	36–3992–98	30.577.5
M	8	29–3174–80	39–4198–104	31.179
L	10–12	31–3580–89	41–44104–111	31.780.5
XL	14	35–3989–98	44–47111–119	32.382

Men's Footwear EU 38 2/3 – 49 1/3

Measure your foot length and match it to the centimetre column for the most accurate fit.

Trail, Road, Hiking & Lifestyle Shoes
US Men's	UK	EU	Foot Lengthcm	Foot Lengthin
6	5.5	38 2/3	23.5	9.3
6.5	6	39 1/3	24	9.4
7	6.5	40	24.5	9.6
7.5	7	40 2/3	25	9.8
8	7.5	41 1/3	25.5	10
8.5	8	42	26	10.2
9	8.5	42 2/3	26.5	10.4
9.5	9	43 1/3	27	10.6
10	9.5	44	27.5	10.8
10.5	10	44 2/3	28	11
11	10.5	45 1/3	28.5	11.2
11.5	11	46	29	11.4
12	11.5	46 2/3	29.5	11.6
12.5	12	47 1/3	30	11.8
13	12.5	48	30.5	12
13.5	13	48 2/3	31	12.2
14	13.5	49 1/3	31.5	12.4

Men's Tops, Jackets & Midlayers

Body measurements. Shell sizing leaves room for a midlayer underneath.

Shirts, Tees, Fleece & Shells
Size	Chestin / cm	Waistin / cm	Hipin / cm	Sleevein / cm
XS	33–3685–91	28–3071–77	33–3584–90	32.181.5
S	36–3891–97	30–3377–83	35–3890–96	32.983.5
M	38–4197–103	33–3583–89	38–4096–102	33.785.5
L	41–43103–109	35–3789–95	40–43102–108	34.487.5
XL	43–46110–118	38–4196–104	43–46109–117	35.690.5
XXL	46–50118–126	41–44104–112	46–49117–125	36.893.5

Men's Pants & Shorts

Inseam is measured along the inside of the leg from the crotch to the hem.

Trail Pants, Softshell Trousers & Shorts
Size	Waistin / cm	Hipin / cm	Inseamin / cm
S	30–3377–83	35–3890–96	3280.5
M	33–3583–89	38–4096–102	32.382
L	35–3789–95	40–43102–108	32.983.5
XL	38–4196–104	43–46109–117	33.585
XXL	41–44104–112	46–49117–125	3486.5

Men's to women's footwear

Men's and women's sizing is not intended for direct conversion. Always match your measured foot length in centimetres instead of subtracting a fixed number of sizes.

Width availability

Most models are built on a narrow, precise last. Selected trail and hiking styles are also offered in a wide fit for a roomier toe box.

Kids' & Youth Footwear EU 26 – 40

Sizes marked “kid” are little-kid sizes; US 1 to 8 are youth sizes. Leave roughly a thumb's width of room at the toe for growing feet.

Junior Trail & Everyday Shoes
EU	US	UK	Foot Lengthcm	Foot Lengthin
26	9 kid	8.5 kid	16	6.3
27	10 kid	9.5 kid	16.5	6.5
28	10.5 kid	10 kid	17	6.7
29	11 kid	10.5 kid	17.5	6.9
30	12 kid	11.5 kid	18.5	7.3
31	13 kid	12.5 kid	19	7.5
32	1	13.5 kid	20	7.9
33	1.5	1	20.5	8.1
34	2	2	21	8.3
35	3	2.5	21.5	8.5
36	4	3.5	22	8.7
37	5	4	22.5	8.9
38	6	5	23.5	9.3
39	7	6	24	9.4
40	8	7	24.5	9.6

Kids' Apparel

Sized by age and height rather than by body measurements. When in doubt, size up.

Jackets, Tops & Pants
Size	Ageyears	Heightcm	Chestcm	Waistcm	Hipcm
XS	6	116	63	53	63
S	8	128	71	58	71
M	10	140	78.5	63	79
L	12	152	83	68	83
XL	14	164	86	70	86

Growing room

Aim for about one centimetre — a thumb's width — between the longest toe and the front of the shoe. Anything more than that will feel loose on descents.

Measure both feet

Children's feet grow unevenly. Measure both feet on the same sheet of paper, in the socks they will wear, and take the longer measurement.

Unisex Footwear

Unisex models are listed with a single foot length. Read across to find the equivalent men's and women's size.

Unisex Trail, Road & Lifestyle Shoes
Foot Lengthcm	US Men's	US Women's	UK	EU	JPcm
21.5	4	5	3.5	36	22
22	4.5	5.5	4	36 2/3	22.5
22.5	5	6	4.5	37 1/3	23
23	5.5	6.5	5	38	23.5
23.5	6	7	5.5	38 2/3	24
24	6.5	7.5	6	39 1/3	24.5
24.5	7	8	6.5	40	25
25	7.5	8.5	7	40 2/3	25.5
25.5	8	9	7.5	41 1/3	26
26	8.5	9.5	8	42	26.5
26.5	9	10	8.5	42 2/3	27
27	9.5	10.5	9	43 1/3	27.5
27.5	10	11	9.5	44	28
28	10.5	11.5	10	44 2/3	28.5
28.5	11	12	10.5	45 1/3	29
29	11.5	12.5	11	46	29.5
29.5	12	13	11.5	46 2/3	30
30	12.5	13.5	12	47 1/3	30.5
30.5	13	14	12.5	48	31
31	13.5	14.5	13	48 2/3	31.5
31.5	14	15	13.5	49 1/3	32
32	14.5	15.5	14	50	32.5

One shell, one last

A unisex model is built on a single last, so both men and women order using the same foot-length column — not two different size numbers.

Fractional EU sizes

Sizes such as 40 2/3 and 42 1/3 are one third of a Paris point apart. They look unusual but map cleanly onto standard half sizes in other brands.

Ski Boots Mondopoint

Wear your ski socks, measure heel to longest toe, then match the length below to the Mondopoint size.

Alpine & Touring Ski Boots
Foot Lengthcm	Mondopoint
22 – 22.9	22 – 22.5
23 – 23.9	23 – 23.5
24 – 24.9	24 – 24.5
25 – 25.9	25 – 25.5
26 – 26.9	26 – 26.5
27 – 27.9	27 – 27.5
28 – 28.9	28 – 28.5
29 – 29.9	29 – 29.5
30 – 30.9	30 – 30.5
31 – 31.9	31 – 31.5
32 – 32.9	32 – 32.5
33 – 33.9	33 – 33.5

Snowboard Boots

Mondopoint is your foot length in centimetres rounded to the nearest half size.

Snowboard Boot Conversion
Mondo	Foot Lengthcm	EU	UK	US Men's	US Women's
23	22.1 – 22.5	36.5	4	5	6
23.5	22.6 – 23	37	4.5	5.5	6.5
24	23.1 – 23.5	38	5	6	7
24.5	23.6 – 24	38.5	5.5	6.5	7.5
25	24.1 – 24.5	39	6	7	8
25.5	24.6 – 25.1	40	6.5	7.5	8.5
26	25.2 – 25.6	40.5	7	8	9
26.5	25.7 – 26.2	41.5	7.5	8.5	9.5
27	26.3 – 26.7	42	8	9	10
27.5	26.8 – 27.2	42.5	8.5	9.5	10.5
28	27.3 – 27.7	43	9	10	11
28.5	27.8 – 28.3	43.5	9.5	10.5	11.5
29	28.4 – 28.8	44	10	11	12
29.5	28.9 – 29.4	44.5	10.5	11.5	12.5
30	29.5 – 29.9	45.5	11	12	13
30.5	30 – 30.5	46	11.5	12.5	13.5
31	30.6 – 31	46.5	12	13	14
31.5	31.1 – 31.5	47	12.5	13.5	14.5

Helmets

Measure the head circumference at the widest point, just above the ears.

Adult & Kids' Ski Helmets
Range	Size	Head Circumferencecm
Adults	S	53 – 56
Adults	M	56 – 59
Adults	L	59 – 62
Adults	XL	62 – 64
Race fit	S	55 – 56
Race fit	M	56.5 – 57.5
Race fit	L	58 – 59
Kids	KS	49 – 53
Kids	KM	53 – 56
Kids	KL	56 – 59

Snowboard Bindings

Binding Size by Boot Size
Binding	EU	UK	US Men's	US Women's
S	34.5 – 39	2.5 – 6	3.5 – 7	4 – 8
S/M	40 – 40.5	6.5 – 7	7.5 – 8	8.5 – 9
M	41.5 – 42.5	7.5 – 8.5	8.5 – 9.5	9.5 – 10.5
M/L	43 – 43.5	9 – 9.5	10 – 10.5	11 – 11.5
L	44 – 47	10 – 12.5	11 – 13.5	12 – 14.5

Socks

Socks are sized by shoe size rather than by foot measurement.

Unisex Trail, Running & Ski Socks
Order Size	EU	UK	US Women's	Foot Lengthcm
S	36 – 38	4 – 5.5	5 – 7	22 – 24
M	39 – 41	6 – 8	8 – 10	24.5 – 26.5
L	42 – 44	8.5 – 11	9.5 – 12	27 – 29
XL	45 – 47	11.5 – 14	12.5 – 15	29.5 – 32

Gloves

Measure the length from the base of the wrist to the tip of the middle finger, and the width across the knuckles.

Hand Length & Width
Size	Hand Lengthin / cm	Hand Widthin / cm
XS	5.714.6	2.87.2
S	6.115.5	37.6
M	6.516.4	3.17.9
L	6.817.3	3.28.3
XL	7.218.2	3.48.6

How to Measure Your Foot

Take five minutes and measure properly — it is the single biggest factor in getting the right fit.

Prepare the paper

Place a sheet of paper on a hard floor against a wall. Wear the same socks you would wear with the shoe.

Trace your foot

Stand with your heel against the wall and your foot perpendicular to it. Draw a line just in front of your longest toe.

Measure both feet

Repeat for the other foot, then measure heel to line on each. Always use the longer of the two.

Match the table

Find your measurement in the centimetre column and read across to the size. If you land between two, choose the larger.

How to Measure Apparel

Chest

Measure horizontally around the widest part of the chest or bust, keeping the tape level.

Waist

Measure around the narrowest part of the waist, above the hip bones.

Hip

Standing with feet together, measure around the fullest part of the hips and seat.

Sleeve

Measure from the middle of the back, across the shoulder, down the outside of a slightly bent arm to the wrist.

Inseam

Measure along the inside of the leg from the crotch to the bottom of the ankle.

Finding Your Salomon Fit

Trail running

Built for locked-in control on technical ground with a precise, narrow hold. True to your measured foot length; size up half a size for ultra distance or wide feet.

Hiking & backpacking

Roomy toe box and a supportive mid-cut hold. Generally true to size and comfortable straight from the box.

Lifestyle

Some silhouettes run slightly generous. If you are between two sizes and prefer a closer fit, take the smaller one.

Ski & snow

Boots follow Mondopoint rather than US or EU. Shells can be custom-fitted, so start from your measured foot length in centimetres.

Layering

Shells and midlayers are sized to fit over a base layer. If you plan on heavy layering, consider one size up.

Between two sizes?

Go with the larger size for running and hiking, and the smaller size for close-fitting apparel and compression layers.

Care & Returns

Returns: unworn, unwashed items in original packaging can be returned within the stated return window.
Exchanges: wrong size? Exchange for another size or colour while stock lasts.
Footwear: try shoes on indoors first — worn outdoors or with dirty soles they may not qualify for return.
Care: air dry footwear at room temperature, away from direct heat, and never machine wash or tumble dry.

Conversions follow Salomon's published sizing for men, women, kids and unisex models. Measurements are approximate and provided for reference only.

Taking cues from Alpha's legendary fit, the S/Pro Alpha BOA® 100 is ideal for skiers ready to level up. It features Salomon’s revolutionary ExoDrive and Powerlink technologies for responsive control and a balanced flex. A 98 mm last offers a close, performance-inspired fit, and the cuff-mounted BOA® Fit System enables precise micro-adjustment.

Weight per unit: 1850 g

Width: Narrow

Compatibility Norm: Gripwalk - Adult

Level of Practice: Intermediate

Stiffness: Medium

Flex Value: 100

Adjustment: Screwed cuff alignment pivot, Powerlink™, Full service

Boot Shell: Custom Shell™ HD, Polyurethane

Cuff: Exodrive™, Polyurethane

Insole: Light 2 footbed

Liner: S/Pro CF

Pads: Gripwalk premounted ISO 23223

Tightening: 1 screwed BOA® Fit System, 2 screwed aluminium

Strap: Screwed Velcro® 35mm

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S/PRO ALPHA C BOA 100

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