Player choices, published evidence and open design questions. These notes summarize related research and its limits. KNOWN means sourced context; OPEN means an unanswered question for our products. The cited studies did not test RememberKO products.
1. Can your calf change during activity?
KNOWN: An MRI study of 18 recreational runners tracked calf muscle changes during a 75-minute run. Average muscle cross-sectional area increased early and decreased later; the pattern differed between muscles. Willwacher et al., Physiological Reports, 2020.
LIMIT: This was running research, not a study of soccer matches, match-sock pressure or the reasons players cut their socks. It cannot establish that a sheer sock improves circulation or performance.
OPEN: How our sock and calf sleeve respond to movement, fit preferences and repeated wear remains to be tested.
2. Does your foot move inside the boot?
KNOWN: Apps et al. reported reduced in-shoe displacement during braking and faster slalom performance for the commercial grip socks they tested. They also noted that natural foot spreading complicates the measurement. Journal of Sports Sciences, 2022.
A separate study of 12 recreational male soccer players found no significant reduction in foot sliding or course running times with its high-friction sock condition, despite a higher perception of speed. Friedl et al., Footwear Science, 2023.
LIMIT: The studies used different socks, participants and tasks. These results do not validate Sheer Grip.
OPEN: The performance and durability of our own grip layout have not been established.
3. Does tape keep holding?
KNOWN: A study of 27 active women found that elastic and inelastic ankle-support tape provided less restriction of ankle movement after 30 minutes of exercise. Abián-Vicén et al., Foot & Ankle International, 2009.
LIMIT: Ankle-support taping is different from tape used to secure team socks or shin guards. The study does not establish how ordinary sock tape behaves, or any circulation benefit from our proposed products.
OPEN: Our calf sleeve’s retention objectives remain to be tested.
4. How much shin does a guard need to cover?
KNOWN: Laboratory research compares how different shin guards transmit impact loads. Such tests use specific guards and test conditions; they do not guarantee protection in a match. The Effectiveness of Shin Guards Used by Football Players, 2014.
EQUIPMENT RULES: IFAB Law 4 requires suitably made, appropriately sized shin guards that provide reasonable protection and are covered by socks. Players are responsible for their guards’ size and suitability. Tape or material worn outside the sock must match the color of the part it covers. IFAB Law 4. Competition requirements should also be checked.
OPEN: We have not completed shin-guard-retention or protection testing for the calf sleeve. It is a separate product direction and is not a substitute for shin guards.
Where RememberKO stands
Sheer Grip and the technical calf sleeve are in development. Intended features are design objectives. We do not claim verified performance, injury prevention or circulation benefits. Current apparel and headwear are separate products made to order through Printful.
Reviewed October 14, 2026.