I would not wash them because the grip it's self is leather. Unlike some of those fake leather products, JerFit is real leather. They form fit to your hand and washing may change that form.

There are three separate size charts on this item (one in the pics above, two in the description) which are slightly different. Which is correct?

I used the measurements from the picture above, not the picture in the description, and it was spot on. It looks like the written size in the description matches the picture above.

Has anybody tried climbing rope with them? Looking to use these during training for spartan race

I would not recommend JerkFit Grips at all. Go with Bear Komplex Grips and you will be satisfied. Not sure how any grips will do with rope climbing since the rope will likely cause a twisting motion on the grips. For rope climbs you may want to go with gloves.

Do you need to chalk them up?

I chalk both sides of them (the side that contacts your hand and the side that contacts the bar). I’ve found this keeps them from sticking to your hands and helps them glide on the bar when you loosen your grip. I’ve had these for about a year and a half and use them a few times a week. Highly recommend!

Model Number	645759921956-MB
Color	ブラック
Size	X-Large
Hand Orientation	Ambidextrous
Material	Leather
Sport Type	Gymnastics
Batteries Included	No
Target Audience	gym goers, competitive weightlifters, crossfit, olympic weight lifters, strong woman, kettlebell, powerlifters, crossfitters, calisthenics, bar star, sportsmen, gymnasts, oly lifting, deadlifters, unisex, men, women, athletes, cardio P90X
Glove Type	gymnastics
Package Dimensions	23.9 x 23.9 x 1.8 cm; 91 g

JerkFit RAWグリップ2本指レザーハンドグリップ ウェイトリフティング カリステニック プルアップ WOD 体操 クロストレーニング用 手のひら全体保護 裂け目防止

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JerkFit RAWグリップ2本指レザーハンドグリップウェイトリフティングカリステニックプルアップ WOD 体操クロストレーニング用手のひら全体保護裂け目防止