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To prevent sun rays from penetrating the skin, sunscreens use either a Chemical Absorber by converting it to heat, or a Physical Blocker to reflect the rays.

Chemical Absorbers
Chemical Absorbers generally include names such as salicalate, cinnimate, or benzophenone. There are several variations within those chemical families and a formula will often include two or more absorbers. By converting the energy of a sun ray into heat there is a reduction in the damage these rays can do to your deep skin. A newer absorber called avebenzone (Parsol 1789) has been shown to provide added protection against UVA rays under lab conditions. Though in applications in “real world” conditions, we feel as though the benefits of avebenzone are significantly diminished and often lost, which is why we choose not use this fairly common absorber in any of our sunscreen solutions.

Physical Blockers
Physical Blockers are either Titanium Dioxide (TiO2) or Zinc Oxide which literally reflect the sun's rays. While in theory these are wonderful, our extensive research has yet to see formulas which are able to hold these particles in place during activity nor have we been able to develop such a formula which meets or exceeds our current formulas. If such a technique were found the result would be truly better protection against UVA rays.

Delivery Systems
With those as the options for active ingredients, formulators now choose one of three delivery systems to present and hold the sunscreens to your skin:

  • Mid Layer Sunscreens
  • Top Layer Sunscreens
  • Surface Sunscreens

May 9, 2022

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We are More Than an Outdoor Company. Water Filtration, Insect Repellent, Sunscreen & First Aid, from the Backcountry to the Backyard.


My only complaint is that eventually, backflushing won’t be enough. These can clog up after some time and no amount of back flushing will fix its low flow. I went through 2 on the AT. However, it will attach to Smart Water Bottles and most bladders!

Anna Hamrick


Built for backcountry reliability and portability, the Sawyer Squeeze filter is our pick for the best portable water purifier.

Pete Ortiz


The Sawyer Squeeze was (by far) the most common Pacific Crest Trail water filter this year – for the fifth year in a row. It’s a $39, 3 oz / 85 g hollow fiber filter that rids your drinking water of protozoa and bacteria (and floaties). It can be used with Sawyer bags (included with the filter) or with compatible water bottles (Smartwater is the bottle of choice for many hikers).

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