All shirts are 100% cotton and hand-washable/hang dry (do not launder in machines). Simply remove the driver unit and cables from the inside of the shirt.
Drivers use 4 easily-replaceable AAA batteries. Shirt is 100% cotton, available in adult sizes Small through 5XL. XXL and 3XL have a $3 sizing surcharge, 5XL has a $4 sizing surcharge.
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