Top Rated: Rab Sonic SS Zip Tee (7.8 / 10)
Category: Lightweight (Under 150g) Trekking T-Shirt
Rab's Sonic is simply an ultra-breathable, ultra-light zipped tee that self-identifies as a baselayer. The Sonic is extremely comfortable, has durable, low profile seams, soaks up moisture well and dries rapidly. It packs away small and would make an ideal backup / spare for very long trips and won't weigh you down should you choose to carry it and wear a genuine baselayer instead. We have some reservations about long-term durability, but that's always the case when going ultralight and at under 100g the Sonic is truly in the UL class.
So, until someone delivers on a reasonably priced Vertical Block with a 3/4 length zip or Ronhill's Advance rises from the ashes, Rab's Sonic is our current top pick in the Lightweight Trekking T-Shirt catergory.