While the TLT and DST acronyms make the name of the Dynafit TLT DST Jacket a bit ambiguous, the decision to use it as a daily driver for the fast and light ski touring crowd is clear as day. For the record, TLT means Tour Lite Tech and DST signifies the use of Dynastretch - a tightly woven stretchy fabric with a DWR finish. This fabric provides both wind and water resistance while still being breathable and unrestrictive. Perfect for lapping powder all day. And unlike many other women's softshell jackets, the TLT DST jacket boasts front zippered skin pockets that allow you to keep your skins warm and sticky during your descents. That way, every lap can start with skins in tip-top shape. The Dynafit TLT DST is everything you need in a jacket for a day of moving fast through the mountains, and nothing you don't.