The Delta LT from Arcteryx is a versatile fleece that works great as a lightweight all-year mid layer or as a warm base layer for much more extreme conditions. This fleece is made of Polartec Micro Velour Small Grid fleece fabric which wicks moisture and has superb warmth to weight ratio. This fleece has seen a fair bit of use but remains in great condition. Let me know if you have any questions! Thank you for looking. :)