Exterus™ Men's Spectrum LS Shirt

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(11 reviews) Write a Review


Sometimes the forecast can leave you scratching your head when it comes to preparation.  Large temperature swings and fluctuating conditions can make dressing up an unnecessary challenge.  The Spectrum LS shirt starts the day off as a medium weight insulating baselayer to wear under your favorite jacket. It then doubles as a sun protecting, moisture wicking shirt to keep on wearing after the day goes on and the jacket comes off.  A truly versatile piece for outdoorsman of all types.


  • 100% Polyester
  • UPF20+ Sun Protection
  • Moisture Wicking
  • Fit: Standard
  • Imported

Sizing Chart


11 Reviews

  • 5
    Light yet warm, glad I bought it.

    Published by Bob K. on 21st Jan 2017

    Purchased three, I love them, light weight but warm when out on the lake. Bought another and a jacket for a friend for Christmas.

  • 5
    Great shirt, relaxed fit

    Published by David Peterson on 3rd Jan 2017

    Great base layer for winter Steelhead fishing. Shirt is well made and has a smooth finish that make it easier to put on and take off layers of clothing.

  • 5
    Very nice mid weight shirt.

    Published by Bob K. on 12th Nov 2016

    Used it upon arrival. Worked great out on the lake in late October. I'm going to use it as a layer this winter. Great price.

  • 5

    Published by Dave on 8th Nov 2016

    Love the shirt, very comfortable.

  • 5
    Excellent top layer

    Published by Ranger on 6th Nov 2016

    Super shirt, non-restrictive, warm, lightweight. Clothes for fly fishing developed by fly fishing enthusiasts.

  • 4
    Very comfortable

    Published by Dave P on 29th Oct 2016

    I love these things. I got them as a base layer for high country fish trips and for hunting, but they are so comfortable I wear them around the house for causal stuff. Not as warm as I thought they would be, but I'm in AZ so they actually work out perfect for what I do. They fit well and look good and are very well made.

  • 5
    Great shirts at full price

    Published by Patrick Camp on 26th Apr 2016

    Another well-made product from Allen. I'm not sure why these went on sale? They are comparable to the $40+ base layer shirts Cabela's sells - and the Cabela's shirts don't have the UPF protection. Keep it up, guys.

  • 3
    did not receive this shirt received two sunnivanna (sp)

    Published by Chris of Alaska on 21st Sep 2015

    The good folks at Allen inadvertly sent two sunivanna shirts instead of one each spectrum and sunivanna. I have not called yet to correct this. The shipping was excellent however.

  • 5

    Published by Unknown on 17th Sep 2015

    Great fit. Quality materials.

  • 5
    Great Mid-weight shirt

    Published by @North2theFuture on 10th Sep 2015

    This shirt is a great mid-weight piece that is versatile and comfortable. It is a looser fitting shirt, that is thick enough for mid-weight or outwear warmth, but not too heavy as to overheat you as the sun comes out and the day warms up. Perfect for those late-spring, early-fall days when you know you wont wear the shirt all day, but you need to start or end with a layer.

    It is 100% poly, so it feels synthetic - but the cut, color, and stitching are all great. A really versatile top.