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Climb comfortably in our lightest, most breathable fully insulated hoody.
The Proton SL Hoody was previously the Proton Lightweight Hoody.
4 payments of $112.50
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Proton SL Hoody Men's is a lightest, most breathable fully insulated hoody designed for alpine and rock climbing in cool conditions.
Pair it with a men’s shell jacket for added weather protection on alpine routes.
The lightest, most breathable option in our Insulation Collection, the Proton SL Hoody takes the guesswork out of warming up on cold climbs and other high-output activities in cool conditions. The knit insulation holds its loft and shape—no matter how often you stuff it into the bottom of your pack. More importantly, it allows your body to breathe, so you’re not left a sweaty mess after you have to step on the gas to get through the crux.
What's been updated: Updated with recycled Fortius™ fabric for improved durability, and chest pocket and design lines that align with the Proton Collection.
Need a heavier option? Try the Proton Hoody.
Produced in a Fair Trade Certified facility. Building worker well-being into our product DNA.
Versatile high performance designs for diverse activities and conditions.
Air permeable mid layer insulation with abrasion and weather resistant.outer surface.
Superlight materials and design, emphasizing light weight and packability over durablity.
Articulation removes restriction, so we utilize complex patterning and seam placement to create three-dimensional designs that free you to move.
Synthetic insulation provides warmth even when wet. Abrasion-resistant and quick-drying, it delivers comfort and performance in demanding conditions.
Our trimmer fit is patterned to stay close to the body through the chest, waist, hip, and thigh. Its low profile eliminates bulk, moves with the body, and fits comfortably over first layers or under outer layers.
Size
Sleeve
Chest
Waist
Hip
XXS
78
84
69
83
XS
81
89
74
88
S
94
79
93
M
86
102
100
L
109
108
XL
91
119
104
118
XXL
129
114
128
3XL
96
139
124
138
30
33
27
32½
31½
35
29
34½
37
31
36½
34
40
39½
43
42½
36
47
40½
46½
51
44½
50
38
54½
48½
54
Europe
UK
China
Japan
Korea
42
32
170/88A
85
44
170/92A
90
46
170/96A
95
48
175/100A
52
175/108A
LL
110
56
180/116A
3L
120
60
180/128A
4L
130
64
180/136A
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NOTE: Men's fit has been updated with a revised fit. Medium size remains unchanged. Smaller sizes are now tighter and larger sizes are now looser. Arc'teryx sizes are intended to fit the above body measurements. If your measurements are between sizes, select a larger size for a looser fit or a smaller size for a tighter fit.
Note: Calculate your own body measurements, then select your product size.
1. Sleeve: With arm relaxed at your side and slightly bent, measure from centre back neck, across shoulder to elbow and down to wrist.
2. Chest: With arms relaxed at your sides, measure under your arms, around the fullest part of your chest
3. Waist: Measure around your waist at the narrowest part.
4. Hip: Standing with feet hip width apart, measure around your hips at the widest part.
Cut snug to the body through the entire garment to enhance moisture management and thermal efficiency.
Cut slim to the body through chest, waist, hip and thigh for a low profile fit.
Cut comfortably from the body through bust/chest, waist, hip and thigh for a classic fit.
Cut loosely through the waist, hip, and thigh for a casual fit.
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