SRBA Thumb Hole Forearm Sleeve Protector 

Tubular Arm sleeves of (Average) 400mm in length.  Option 450mm 

 These sleeves are designed to impede slashes and cuts from sharp instruments.

Because of the nature of the loose weave they WILL NOT offer protection from sharps or thrusting/stabbing implements (knives, daggers etc) This style is light and very breathable.
The Thumb holes do offer partial protection to the palm and back of the wrist, however – because of the “slippery” anti-cut nature of the fibres, one would not be able to securely grasp objects that are in contact with fabric alone.