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The ALPS Flex Sleeve (SFX) is a prosthetic suspension sleeve shaped with a 30 degree bend, so it follows the knee when you sit or climb stairs and gathers less behind the joint. Inside the seamless knitted fabric is a 3 mm layer of high-density gel. Five sizes fit thighs from 34 to 50 cm, in beige or black, and ALPS recommends it for waterproof prostheses.
- Type
- Gel suspension sleeve
- Pre-flexion
- 30 degrees
- Gel
- 3 mm uniform, HD Gel
- Fabric
- Seamless knit
ALPS Flex Sleeve (SFX) key features
- Pre-flexed 30 degrees
- 3 mm uniform high-density gel
- Seamless knitted fabric
- Five sizes for 34-50 cm thigh circumference
- Beige or black
- Recommended by ALPS for K1-K4 and waterproof prostheses
Who the ALPS Flex Sleeve (SFX) suits
Fits below-knee prosthesis users who rely on a sleeve to hold the leg on, including those with a waterproof or shower leg. It may help if a straight sleeve bunches behind your knee. Have your prosthetist measure the thigh for size.
This kind of device is prescribed and fitted by a clinician. An enquiry starts that conversation. It is not a purchase.
ALPS Flex Sleeve (SFX) specifications
| Type | Gel suspension sleeve |
|---|---|
| Pre-flexion | 30 degrees |
| Gel | 3 mm uniform, HD Gel |
| Fabric | Seamless knit |
| Sizes | 34-37, 36-39, 38-42, 41-46, 45-50 cm |
| Colours | Beige, black |
| Activity level | K1-K4 |
| Amputation level | Transtibial |
| Price | Quoted on request |
| Maker country | USA |
| Brand | ALPS |
| Category | Components and consumables, Sleeves |
| Catalog ID | PR-087 |
Compared with the source page on 5 October 2026. Details can change, so we confirm them in your quote. Open the source page.
ALPS Flex Sleeve (SFX): common questions
What size ALPS Flex Sleeve do I need?
Five sizes cover thigh circumferences of 34-37, 36-39, 38-42, 41-46 and 45-50 cm. Your prosthetist can take the measurement.
Why is the Flex Sleeve bent?
The 30 degree pre-flexion makes bending the knee easier and reduces bunching of material behind it.
Can the ALPS Flex Sleeve be used on a waterproof leg?
Yes. ALPS recommends it for waterproof prostheses.
How to get a quote for the ALPS Flex Sleeve (SFX)
Add it to your enquiry list
Press Add to enquiry. You can add other products and parts to the same list.
Tell us your country and needs
Send the list with your country, sizes and any options you want. No payment details are asked.
Get a personal reply
You receive availability, a price and delivery options by email, and decide after that.
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