The 300B is a directly-heated power triode vacuum tube with a four-pin base, introduced in 1938 by Western Electric to amplify telephone signals. In the 1980s it began to be used increasingly by audiophiles in home audio equipment. The 300B has good linearity, low noise and good reliability; it is often used in single-ended triode (SET) audio amplifiers of about eight watts output. A push-pull pair can output 20 watts. (Wikipedia.org)

 

 

.: Made with a medium-heavy fabric (8.0 oz/yd² (271 g/m²)) that consists of 50% cotton and 50% polyester for that cozy feel and warmth you need in a hoodie.
.: The classic fit along with the pouch pocket and the tear-away label make for a highly comfortable, scratch-free wearing experience.
.: The color-matched drawcord and the double-lined hood add a stylish flair and durability that tie everything together.
.: Made using 100% ethically grown US cotton. Gildan is also a proud member of the US Cotton Trust Protocol ensuring ethical and sustainable means of production. The blank tee's dyes are OEKO-TEX-certified dyes with low environmental impact.
.: Fabric blends: Heather Sport colors - 60% polyester, 40% cotton