Formthotics
Formthotics Sport Run Single Layer Insoles (Pair) 311S
Item # OAC311SXXS
Shown: XXS
Price as of November 6, 2026 for the option shown. Prices, promotions and availability are subject to change. Visit healthcaresolutions.ca or call us for current pricing.
- Available sizes: XXS, XS, Small, Medium, Large, XL, XXL
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About this product
Formthotics Sport Run Single Layer insoles are designed to place the feet in a naturally supported, comfortable position to help support a faster run pace for longer. The thermoformable foam moulds to the unique shape of each foot, aiming to improve shoe fit and comfort, promote more even weight distribution, and help absorb shock. Run Single is best suited to walking, trail, or road running shoes, and is ideal for footwear with less internal volume, such as tighter-fitting race shoes. It's also a good option when transitioning to minimalist footwear.
Features and Benefits
- Designed to support a more efficient running stride with improved stability
- May help reduce muscle fatigue, according to the manufacturer
- Designed to support natural foot positioning
- Super lightweight at just 19 g (0.67 oz)
- Thermoformable foam for a personalized, heat-moulded fit in-store within 3 minutes
- Contains Ultra-Fresh antimicrobial treatment to help inhibit odour- and stain-causing bacteria and fungi
- Closed-cell foam resists moisture penetration, helping keep insoles light and easy to clean
- Arch support designed to offer longitudinal, lateral, and transverse support under the metatarsal heads
- Teardrop-shaped milled foam contour intended to enhance medial stability
- Three-dimensional heel cup designed to assist with shock absorption and help minimize heel strike
How It Works
Formthotics use a biomechanical design paired with thermoformable foam to create a load-spreading contact between the foot and the orthotic. This is intended to support balance, stability, and sensory feedback (proprioception) during movement. The design aims to keep the foot strong and stable, helping the limb and knee stay aligned over the foot to support efficient forward movement.
Indications
Intended for individuals seeking additional in-shoe support and comfort for walking, trail running, or road running, particularly in lower-volume footwear.
Specifications
| Layer Type | Single layer |
| Weight | 19 g (0.67 oz) |
| Antimicrobial Treatment | Ultra-Fresh |
| Foam Type | Closed-cell, thermoformable foam |
| Fitting Time | Approximately 3 minutes (in-store heat moulding) |
| Best Suited For | Walking, trail running, and road running shoes; lower-volume/tighter-fitting footwear |
Sizing
| XXS | XS | S | M | L | XL | XXL | XXXL | |
| UK | 2.5 | 3-4.5 | 5-6.5 | 7-8 | 8.5-9.5 | 10-11.5 | 12-14 | 15-16 |
| Euro | 35 | 35.5-37.5 | 38-40 | 40.5-42 | 42.5-44 | 44.5-46.5 | 47-50 | 51-53 |
| US (Women) | 4-5 | 5.5-7 | 7.5-9 | 9.5-10.5 | 11-12 | - | - | - |
| US (Men) | 4-5 | 5.5-6 | 6.5-7.5 | 8-9 | 9.5-10.5 | 11-12.5 | 13-15 | 16-17 |
| Mondo Pt | 20-22.5 | 23-24 | 24.5-25.5 | 26-27 | 27.5-28.5 | 29-30 | 30.5-32 | 33-34 |
Sizes shown are XXS through XXXL, left to right. Mondo Pt sizing is only available in certain models.
Care Instructions
Closed-cell foam resists moisture and is easy to wipe clean. Avoid prolonged exposure to direct heat sources other than the initial in-store heat-moulding fitting, as this may affect the shape of the insole.
Package Includes
1 pair of Formthotics Sport Run Single Layer insoles
1 x instruction manual