Contents: 100% polyester

Weight: 60, 90, or 120 grams/square meter

Alpha is a uniquely designed fleece fabric that optimizes warmth and breathability, making it the ideal active insulation layer. With lofted fibers connected to a lattice of threads, Alpha continuously releases body heat, preventing discomfort while active.

Alpha’s top attributes:

  • Regulates warmth: Alpha’s lofted fibers trap body heat to maintain warmth, while simultaneously releasing heat before it builds to a point of discomfort.
  • Lightweight: average garment weights across styles range from just 3.5-7.5oz.
  • Compressible: due to it’s low weight and knit design, Alpha packs down to nothing, making it the perfect layer to have on the go.
  • Hydrophobic: it does not absorb sweat or water.
  • Fast drying: as a porous fabric, Alpha dries incredible quickly
  • Cozy as can be: the comfort of this fabric cannot be denied


Which weight is right for you?

Whichever you choose, you will be selecting a very light and packable layer that WILL be cozy!

Sambob makes hoodies in three different weights of Alpha:  60, 90, and 120 grams per square meter (gsm). This equates to an average weight of 3.5oz for a hoodie in the 60 weight, 5.5oz for a hoodie in the 90 weight, and 7.5oz for a hoodie in the 120 weight.

hoodies are a very lightweight layer ideal for the summer, as a layer in the morning during a run or to bring along in case of a chill in air in the evening







hoodies are a mid-weight layer popular amongst day hikers, runners, and thru-hikers alike, providing enough warmth on its own to be a stand alone layer and paired well with a wind or rain jacket for extra warmth.






120gsm hoodies are a "heavy-weight" layer optimal for early spring or late fall hiking or as a toasty layer to wear under your puffy in the depths of winter.