So, technically, the Apollo is meant to replace the inside of certain Alpha Strokers. BUT! It makes a spectacular handheld masturbation sleeve, too. 

The super-soft Alpha surrounds your (or someone you like's) cock, clinging, gripping, and stimulating as you slide it back and forth. It's closed off around the back, so it'll naturally build up lots of suction.

The TPR Alpha Sleeve is easy to clean with soapy water or a favorite toy care fluid/foam, and it's good to go with any lube you love.