Ronaldo
Bionic Poster
They are definitely more comfortable when I hit the ball in the sweet spot. With the 15 MPH winds today and 10 days off from tennis, I hit plenty of balls outside the sweetspot and on the frame. On those hits, I didn't notice any extra protection. Bottom line is I'd recommend them to anyone with arm issues.
Wear these, no probs
http://www.craftsy.com/pattern/crocheting/accessory/snow-friends-scarf--mittens-pdf-12-066/31560