Mountainsmith Day Lumbar Pack Black Main


The lumbar pack that started the craze in the 80s, the Day pack lives on in its modern incarnation as a favorite of hikers and outdoor-minded travelers. With a broad swath of versatile uses, this pack tends to become a cherished possession in every outdoor enthusiast’s gear closet. However, it does not stay there long as it gets used daily as a hiking pack, disc golf bag, messenger bag, office briefcase, carry on travel solution, diaper bag, and whatever you can think of. Built with ultra-durable CORDURA® fabric, the Day lumbar pack will become your outdoor security blanket as it logs hundreds of thousands of miles adventuring with you around the world.

Though the design honors the 35+ year history of this waist pack and has not changed much in shape, modern features make this version of the Day the best yet. Features now include a tuck away waist belt for messenger style carry, removable shoulder strap, traditional front panel bungee, Strapette compatibility (sold separately), interior tablet sleeve, smart phone compatible waist belt pocket, ridged EVA back panel padding with stash pocket, side water bottle holders, hanging inner sanctum pocket, zippered front panel pocket with key clip, bottom compression straps, and a headphone port. We have heard this product used for just about anything including a 3 day backpacking trip in the Sierras. Where will this fanny pack take you?

To bring you peace of mind for your backcountry investment, Mountainsmith offers a lifetime warranty on their products. If you have had a Day pack in your lifetime, you already know how useful it can be. If not, what are you waiting for?

Latest Reviews

Great for Motorcycling
by on
It is big for a lumbar pack and heavier than ultralight packs with more capacity.

But, this pack is amazing as a motorcycle pack. When you wear it, the pack rests on the seat behind you instead of on your back. It looks good and you feel much more stable on the bike than with a rucksack.

And... It doubles as a great tailbag. I clip it on to my rear rack and use the bottle holders to carry extra petrol. Then when you get to camp, you just unclip it and wear it as a pack.

This bag is a 100% better tail bag for dual sport riding than most of the tail bags available for motorcycles. I wish I could post pictures.
by on
I have been a big believer in the lumbar pack for many years now. My only concern with them was that they were too small. My son has a Tour and I always admired how well it was put together, so when I decided to upgrade my old Kelty Summit, I went with a Mountainsmith Day TLS. Wow! Here you have a brilliantly designed pack for those of us who want to take "just a little bit more" on our excursions. There's a place for everything, it seems. I'll never use the laptop sleeve, but it seems to me it would fit a hydration bladder. Who knows? The bungees on the outside make a convenient place for my Z-seat, and the water bottle sleeves are easy enough to reach once you've broke 'em in a bit. Better still, I almost forget I'm wearing it…it has the capacity of a backpack with the easy carry of a lumbar. The "strapettes" are awesome…they should come with the bag, I think, they're so essential. So far as durability is concerned, well, I've been using my Day for almost three years and it still looks brand new, despite my usual (lack of) care for my gear, on trips from short jaunts in nearby packs to ten milers at LBL. I have never lacked for anything. If I had a complaint, it would be that both the strapettes and the waist belt on the Day could be somewhat longer for those of us of somewhat larger stature. We like to hike too, you know…
Loving it!
by on
This is my third edition. I love the first one but wanted the second one due to the pocket on the waist belt and the tablet section in the main compartment. The new version I love I like how they added the zipper to the pocket on the belt and love the mollee on the front to attach items to. I use the strappettes when hiking.

It is amazing how I go to this bag first for hiking, at the gym, and around town. It is so versatile.

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A staple of gear closets everywhere for the past 35 years. In 2016, the Day gets even more durable with the addition of Cordura® fabric, and all the features you have come to love.

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  • Interior foam padded sleeve for tablet carry
  • Smartphone compatible waistbelt pockets (Fits up to iPhone 6+ and Galaxy S6)
  • FreeFlow ridged EVA backpanel padding
  • Backpanel stash pocket ideal for securing passport, boarding pass, etc.
  • Patented Delta Compression System load adjustment
  • Side reinforced bottle pockets (fits up to 32oz)
  • Inner Sanctum interior zipped compartment for small valuables
  • Zippered front panel pocket with key clip
  • Bottom panel compression straps
  • Bright yellow lining promotes interior visibility
  • Removable shoulder straps
  • Headphone port
  • Bar tack reinforcements
  • YKK® Zippers
  • 3M™ Reflective Cord
  • 610d Cordura® HP
  • 210d Nylon Embossed Liner
  • 13" x 12" x 6" / 33 x 30 x 15 cm (L x H x D)
  • Waistbelt Width: 1.5"
  • Waistbelt Circumference: 28" - 48"
  • 800 cubic inches / 13 L
  • Up to 15 lbs
  • 1 lb 12 oz / 0.8 kg
  • Black: 16-10060-01
  • Grey: 16-10060-65
  • Hops: 16-10060-09
  • Huckleberry: 16-10060-49
  • Barley: 16-10060-14
  • Camo: 16-10060-46
  • Red: 16-10060-02
  • Blue: 16-10060-39
  • Black: 757894324377
  • Grey: 757894324384
  • Hops: 757894324964
  • Huckleberry: 757894324407
  • Barley: 757894324414
  • Camo: 757894325268
  • Red: 757894325060
  • Blue: 757894324391