Size Chart Guide

  • Above-Knee

STEP 1: Measure Circumference

Measure the circumference of your prosthetic socket along the very top. Continue to STEP 2: Find your size


How to measure for a Knit-Rite AK Brim Sheath.

STEP 2: Find your size

Take your circumference measurement and use the chart below to determine your size. If you're in-between sizes, we suggest remeasuring again to be on safe side.

Size Socket Circumference (in)
Small 14-18
Medium 18-22
Large 22-30
X-Large 30-40



Prosthetic Categories


Knit-Rite A/K Brim Prosthetic Sheath, Slick Nylon


Knit-Rite A/K Brim Prosthetic Sheath, Slick Nylon

Size Chart Guide
$18.30 - $19.90
$18.30 - $19.90
Sale price
Unit price

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*Manufacturer is experiencing 1-4 week production delays. Our stock is limited.


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Buy all three

A/K Brim Sheath Description

The Knit-Rite A/K Brim Sheath is categorized as a prosthetic sheath because it is designed to reduce friction along the brim of your AK prosthetic socket. It’s not uncommon when wearing an A/K prosthetic leg to experience rubbing or pinching along the top brim area. Knit-Rite designed this patent pending prosthetic sheath specifically to address those high friction socket brim areas that become more irritating as the day wears on. This brim sheath will work with any type AK socket design including gel liners using a pin or seal-in systems.


  • Designed to lessen pinching and friction in an above knee prosthetic socket 
  • Ideal if you experience “skin grabbing or pulling” friction along the brim of your AK socket
  • When you're sweating it helps protect your skin along the groin area from rubbing
  • Helps reduce "adductor roll" or skin roll along the inner brim
  • Works great with a locking pin liner or seal-in liner
  • A/K Brim Sheath is made from stretchy slick nylon material
  • Made in the USA
  • Patent Pending
  • Sold each in a polybag

The idea behind this Knit-Rite product is to create a slick interface between your socket and residual limb. When you install the A/K Brim sheath you will notice that it separates your groin skin from the prosthetic socket. On really hot days when you find yourself sweating or your residual limb is a little swollen this brim sheath will certainly get you thru the day. The A/K Brim Sheath is created from stretchy, slick nylon material, constructed in two angled sections permitting complete coverage of your prosthetic socket trimelines. It holds on using a gripper elastic band on the outside.

Suggested Use

An AK Brim Sheath works wonders for those experiencing discomfort in the groin area of their above-knee socket. The brim sheath allows your skin to slide into your socket if you gained a few extra pounds or lessens chafing along the inner brim area.

How-to Apply

Apply your AK brim sheath over the top of your socket with the silicone beads facing your socket. The silicone beads will prevent your brim sheath from shifting around when you walk. Allow only 2 inches of socket coverage before you fold the top of the sheath inside your socket.

Have product questions? We're here to help!


Features & Details

Knit-Rite AK Brim Sheath Materials

Slick Nylon with Top Silicone Beads

Care Instructions

Machine wash cold water. Do not tumble dry or use an iron. Air dry only.


Wear a clean A/K Brim Sheath every day for proper residual limb care.

Part Numbers (SKUs)

Size SKU


If you're not completely satisfied with your Amputee Store purchase, you can return your eligible items within 90 days of the original ship date. Items in new condition (unopened/unworn/unwashed) can be returned for a full product refund less original shipping costs. Please read our complete return policy for further instructions.


Knit-Rite A/K Brim Sheath typically ships within 24 hours.

Product Packaging: Polybag

Customer Reviews & Questions