The Law · lapse rate
6.5 °C per kilometre is the standard atmosphere. On a dry day the air can cool faster, close to 10°; on a humid one, closer to 5°. We design to the average, print the range on every garment, and the Thermal Lab shows you how to read your own forecast.
≥ +26° · 0–1,000 m of climb
Valley floors in summer.
Singlet
+19.5° / +26° · 1,000–2,000 m of climb
Trailheads and morning climbs.
Tee · Short 5”
+13° / +19.5° · 2,000–3,000 m of climb
Forest, the long middle of the climb.
Half Tight
+6.5° / +13° · 3,000–4,000 m of climb
Ridges and cloud tops.
Long Sleeve
0° / +6.5° · 4,000–5,000 m of climb
Wind at altitude, just above freezing.
Wind Shell · Tight
−6.5° / 0° · 5,000–6,000 m of climb
Under the freezing line.
Thermal Hoody
< −6.5° · 6,000–7,000 m of climb
Storms and summits.
Storm Shell · Storm Pant
How we rate
They are its comfort range: the air temperatures in which a runner at steady mountain effort, in light wind, stays comfortable without adding or removing a layer. It is the idea behind sleeping-bag comfort ratings, applied to a body that moves.
The range is printed at the hem in a band tab: seven colour blocks and two numbers, readable with the jacket still in your hand. We measure in a climate chamber in Mexico City, then on trails from sea level to 4,800 m.
Rated in degrees, not in seasons.
Each range is where the garment works on a moving body, worn as its layer (base, mid, shell or legs). Outside it, add or drop a layer.
6 of 10 rated for +8°: Half Tight, Long Sleeve, Wind Shell, Tight, Thermal Hoody, Storm Shell.
| Garment | Layer | Range | −25° · · · +36° | GLARE | SUN | EMBER | FLARE | DUSK | NIGHT | VOID | Weight | Price |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Singlet | Base | +20° / +36° | ● | ● | · | · | · | · | · | 58 g | $68 | |
| Tee | Base | +14° / +30° | ● | ● | ● | · | · | · | · | 84 g | $78 | |
| Short 5" | Legs | +10° / +34° | ● | ● | ● | · | · | · | · | 112 g | $95 | |
| Half Tight | Legs | +6° / +24° | · | ● | ● | ● | · | · | · | 128 g | $98 | |
| Long Sleeve | Base | +4° / +20° | · | · | ● | ● | · | · | · | 142 g | $115 | |
| Wind Shell | Shell | −2° / +14° | · | · | · | ● | ● | · | · | 64 g | $185 | |
| Tight | Legs | −8° / +12° | · | · | · | ● | ● | ● | · | 178 g | $125 | |
| Thermal Hoody | Mid | −14° / +8° | · | · | · | · | ● | ● | ● | 196 g | $240 | |
| Storm Shell | Shell | −24° / +8° | · | · | · | · | ● | ● | ● | 178 g | $420 | |
| Storm Pant | Legs | −22° / +6° | · | · | · | · | ● | ● | ● | 142 g | $260 |
● = rated for the middle of that band. Ranges are for running and climbing effort; stopped or injured, you need one band warmer. LAPSE is a concept brand: ratings are design targets.
Same day.
Half the weight.
Pick a day. We dress it twice: once with LAPSE, once with what is usually in the drawer (cotton, a hoodie, a rain jacket).
+22° at 800 m, up to 4,000 m in 20 km/h wind → you need −4° to +22° covered.
- Weight
- 686 g
- Pieces
- 5
- Range
- −24°/+36°
- Singlet58 g
- Short 5"112 g
- Long Sleeve142 g
- Thermal Hoody196 g
- Storm Shell178 g
- Weight
- 2,180 g
- Pieces
- 6
- Range
- −6°/+32°
- Cotton tee160 g
- Gym shorts180 g
- Cotton hoodie560 g
- Joggers420 g
- Fleece jacket380 g
- Rain jacket (PU)480 g
Normal-clothes weights and ranges are our estimates for typical retail pieces. LAPSE is a concept brand: weights and ratings are design targets.
Origin · Ciudad de México
12:40 · 4,810 m · −4.1° · Storm Shell −24/+8