Wrist brace AM-OSN-U-18

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Product overview
The AM-OSN-U-18 wrist brace by 4fit stabilizes the wrist joint and is indicated for persistent pain and mild instability. It limits excessive motion without fully restricting joint mobility, allowing continuation of sporting activity. The wrap-around design with an elastic circumferential strap enables precise, individually adjustable compression. Elastic stabilizing bands support the joint while preserving full hand mobility. The brace provides both palmar and dorsal stabilization to reduce the risk of torsional injuries from falls. Its anatomical shape conforms to the hand without discomfort. The absence of rigid aluminum components permits use in contact sports.

Indication and context
SPORT INJURY: wrist sprains that occur suddenly during physical activity or daily tasks. Typical symptoms include pain, swelling and reduced range of motion. After a sprain the joint is prone to re-injury; AM-OSN-U-18 helps protect ligaments by stabilizing the wrist and limiting torsion.

Purpose of use

• wrist sprains and ligament injuries
• bursitis and wrist inflammation
• overuse-related wrist pain
• prophylactic support in sports

Sizes
Size — Wrist circumference — How to measure
S — 13-15 cm — (see measurement reference)
M — 15-17 cm — (see measurement reference)
L — 17-19 cm — (see measurement reference)
XL — 19-21 cm — (see measurement reference)
Total length (S–XL): 14.5 cm

Materials and technology
AirRubber III™: unidirectional elasticity that increases length but not width to enhance compression. The braided structure allows air circulation and skin breathability; under compression the braids provide a gentle skin massage. ProFit™: double-layer, multi-directional elastic fabric. Outer side made of spandex for compression and shock absorption during activity. Inner side of microfiber, cotton and elastane for skin-friendliness, breathability and soft feel. ProFit™ is Oeko-Tex Standard 100 certified. Some product variants may include an internal elastic cotton layer. Stiffening elements: orthopedic stays made of ABS prevent wrinkling and uncontrolled fabric movement; they are not rigid aluminum splints but help maintain shape and support fabric control.

Setting up / Documentation
A product-specific fitting manual in PDF format is provided for the AM-OSN-U-18 (instructions and fitting guidance).

Characteristics / technical specifications

• Brand: 4fit
• Code: AM-OSN-U-18
• Trade name: UPPER-EXTREMITY SUPPORT
• Model: AM-OSN-U-18
• Medical device classification: Class I medical device (Regulation (EU) 2017/745)
• Indications: wrist sprains, bursitis, overuse, sport prophylaxis
• Design: wrap-around, anatomical shape; palmar and dorsal stabilization
• Fixation: elastic circumferential strap and elastic stabilizing bands
• Materials: AirRubber III™ braids, ProFit™ double-layer fabric, ABS orthopedic stays
• Features: breathable, compression, latex-free, skin-friendly, durable, no rigid aluminum components (suitable for contact sports)
• Sizes: S (13-15 cm) M (15-17 cm) L (17-19 cm) XL (19-21 cm)
• Total length (S–XL): 14.5 cm
• Ambidextrous: suitable for right and left wrist