M ATShort 5" brief RS - Shadowcastlong run meet cold plunge. beach run meet ocean dip. trail run meet lake swim. the ATShort has a 5 inseam, a self draining pocket for trail mix, a key and a credit card and a quick drying, chlorine and salt water resistant fabric that turns these shorts from run short to swim short quicker than you can say "cool down."

for 2024 we've fine tuned the fit and the patterning by taking some inspiration from our RDCap

making it the ideal layered with our HLSTShirt for chilly runs or a standalone piece on milder days

front and back panels

our COOLmatic | EXP™ DIAMAfleece with carbon seemed about right

never mind the pain

road to trail

in combination with GRS recycled polyester to bring you a moisture wicking

long run meet cold plunge

whether you prefer a relaxed

just pure wool that's soft to touch

) through the city lights

the FSTTShirt adopts a fully recycled COOLmatic|PLUS™ micro mesh for lightweight