Filed under: blister care, Foot Care, Foot Care Products, Footwear, Sports
In my last post, I talked about four ways to reduce shear and the likelihood of blisters. To recap, they were fit, cushioning, moisture management, and socks. Today’s post will cover a fifth way by using ENGO Blister Prevention Patches.
Tamarack Habilitation Technologies is well known for providing healthcare professionals and clients with innovative, value-added orthotic-prosthetic componentry and materials. Their ShearBan product is similar to the ENGO Blister Prevention Patches reviewed in this article. ShearBan is used in the orthopaedic and prosthetic industry on prostheses at amputation stump sites to reduce the incidence of skin breakdown.
Introduced in 2004, ENGO Blister Prevention Patches have radically redefined the way hot spots, blisters and calluses are treated. As a preventative measure, ENGO patches provide peace-of-mind that blisters won’t become a painful, debilitating problem. If a blister has already formed, applying patches to footwear, corresponding to the blistered area eliminates painful irritation and further skin damage, allowing continued activity. Friction forces are reduced by more than 50% when you apply an ENGO Patch to your footwear.
The patches are made from an ultra-thin Polytetrafluoroethylene (PTFE) film and are 0.015 inches total thickness – a very slippery surface. They are very durable, lasting four to six weeks in most applications. The aggressively sticky patch peels away from the backing and is applied to dry shoes or boots. The PTFE ENGO Patch reduces the ‘stickiness’ between the shoe and sock so they can glide over one another. The foot, inside the sock, glides over the patch shear distortion and friction are reduced, and blisters can be averted, in spite of pressure.
Avid runners, hikers and sports players rely on their feet to reach performance goals; from day hikes to ultra marathons. But quality footwear and socks alone don’t eliminate the skin trauma your feet can experience from repetitive rubbing — building friction forces to levels that cause hot spots, blisters and calluses. While I use these patches in runners’ footwear at races, they can also be used in ordinary every day shoes to reduce calluses.
Similar to Tamarack’s ShearBan material, ENGO patches are applied directly to footwear and equipment, not to the skin. Outcomes of this unique application include ease of use, long-lasting and guaranteed friction relief.
ENGO Patches are made in several sizes and types:
- A large oval – 2 ¾ x 1 ¾
- A small oval – 2 x 1 ½
- A rectangle – 3 ¾ x 2 ¾
- Back of the heel patch – 3 ¾ x 1 ¾
- A cushion heel wrap – 3 ¾ x 1 ½
When I work a race I always have a bag with different sizes of ENGO patches. I have applied the ovals and rectangles and the back of the heel patches. The patches are applied to the shoes and insoles – not to your skin. This means wherever you are going to apply a patch has to be dry. My advice is to apply patches before your race when your shoes are dry. I have used them inside the shoes in the sides, in the heels, and on the insoles.
Typical problem areas in footwear are under the heel and forefoot, and at the side of the heel. An oval patch can be applied to overlap the side of the heel counter and the insole as seen is the photo. I often use a rectangle or large oval under the ball of the foot or an oval under the heel – applied directly to the insole. The patches are useful over stitching or seams in footwear that are rubbing the wearer. If necessary, a patch can be cut to shape for where it will be applied.
The patches will reduce shear and friction; provide relief from hot spot and blister pain, and can be used in any type of insole or orthotic and footwear, from sandals to running shoes, and any type of hiking or ski boot.
I like ENGO patches because they work. The patch is thin and does not alter the fit of the shoe. When properly applied to dry footwear, they stick.
Rebecca Rushton, a podiatrist in Australia, strongly recommends ENGO Patches. She discovered the patches after getting blisters herself and now represents ENGO in Australia. She has written several free reports on blister prevention available on her website, Blister Prevention.
If you are unclear about shear and blister formation, here’s a link to my article An Introduction to Shear and Blister Formation.
The Technical Stuff
JM Carlson, in a 2009 report wrote, “The measurement of friction is the ‘coefficient of friction’. The coefficient of friction (COF) is a number that represents this slipperiness or stickiness between two surfaces and is generally below 1.0. Within the shoe, the COF between the foot, socks and insole can range from 0.5 – 0.9. In contrast the COF between a sock and a polished floor is around 0.2.” Tests have shown PTFE patches to reduce the coefficient of friction (COF) in the shoe by up to 80%. The COF is in approximately 0.16, which is significantly lower than all other in-shoe materials. Importantly, the low COF is maintained even in most and wet conditions inside the shoe.
Check out GoEngo.com for more information about ENGO Blister Prevention Patches. They also offer a money-back guarantee.
Disclaimers: I support ENGO Patches and am supplied with whatever I need for the events I work. I am an affiliate of Zombierunner and make a bit of any sale made through the link above.
Athletes who are out in cold and wet conditions need to be watchful for frostbite.
Frostbite occurs when tissue actually freezes. Toes are particularly susceptible to this serious condition. Factors that contribute to frostbite include exposure to wind, wet skin (even from sweat), and tight socks and shoes that constrict blood flow.
Early signs of frostbite include numbness, a waxy or pale discoloration of the skin, the tissue becoming firm to the touch, and pain in the area. As the frostbite progresses, the skin gets paler and the pain ceases. Often frostbite will thaw on its own as the person keeps moving or gets into a warm environment and out of the wind, wet, and cold. As the tissue warms, there can be redness, itching, and swelling.
In severe cases of frostbite, the skin becomes immobile as it freezes with underlying tissue. Blisters can form with clear or milky fluid. Blisters filled with blood indicate deeper damage. While the skin may change color, or even darken, do not assume you will lose the toes. It may take weeks or months to know if amputation is necessary. Check with your physician as soon as possible to determine what care is necessary.
Be aware of moisture inside your shoes and socks in extreme cold conditions. Sweat and outside moisture can change to ice inside your socks, leading to frostbite.
Tips for Managing Frostbite
- Do not rub your toes to warm them—that causes even more tissue damage.
- Do not rub the frostbitten area.
- Unless absolutely necessary, don’t walk on frostbitten feet or toes.
- Get into a warm environment as soon as possible.
- Immerse the affected area in lukewarm—not hot—water, or warm the affected area with the body heat from another person.
- Do not use a heating pad, heat lamp, or the heat of a stove, fireplace, or radiator for warming.
- Do not rewarm or thaw frostbite unless you are sure you can keep the area warm. It is important to remember that thawing the tissue and then allowing it to refreeze can be devastating. Get professional medical help if possible.
- Dehydration will make you more susceptible to frostbite.