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HomeHikingIs the Spark Professional Sleeping Bag Definitely worth the Funding?

Is the Spark Professional Sleeping Bag Definitely worth the Funding?

Sea-to-Summit Spark Down Sleeping Bag Review

The Sea-to-Summit Spark Professional Down 30 Sleeping Bag is a top-of-the-line ultralight 950 fill-power down mummy sleeping bag with premium options, together with a draft collar, zippered footbox, and twin facet zippers. The shell and liner are made with light-weight 10D nylon material with field baffling over the torso and sewn-through building over the legs. Like a lot of Sea-to-Summit’s sleeping baggage, the Spark Professional has two facet zippers, one lengthy and one brief, so you may vent the bag on either side or stick your arms out whereas nonetheless carrying the hood. Nonetheless, the Spark Professional has one deadly flaw, in our opinion: a badly performing zipper on the brief facet that may depart you chilly and shivering at night time when it comes off its tracks at midnight.

  • Sort: Mummy sleeping bag
  • Temperature Ranking: 30F Decrease Restrict; 37F Consolation
  • Insulation: 950 fill energy down with non-PFC waterproofing
  • Weight: 21.8 oz
  • Fill Weight: 10.9 oz
  • Draft Collar: Sure
  • Building: Field baffling in torso, sewn-thru over legs
  • Cloth: 10D nylon shell and liner
  • Compressed quantity: 5.3L
  • Compression Sack: Included
  • Execs: 950 fill energy waterproof down, twin facet zippers, zippered footbox
  • Cons:  Poorly designed facet zipper

The Sea-to-Summit Spark Professional Down 30-degree sleeping bag has superior specs on paper. Its 950-fill energy waterproof down is top-notch and gives glorious heat and compressibility. The hood is snug with out being claustrophobic, even for those who’re a facet sleeper, and you’ll even fold it down beneath you if you wish to use the again extra like a quilt in hotter climate. The bag’s three zippers, together with a ventable footbox and two facet zippers, let you regulate your temperature in quite a few methods throughout a wider temperature vary. All three zippers are properly insulated with draft tubes, which cowl the zippers contained in the bag and stop chilly air from leaking in and chilling you.

The sleeping bag has a zippered footbox which can be vented.
The sleeping bag has a zippered footbox that may be vented.

Along with the footbox zipper, the Spark Professional has two facet zippers, one about 3/4 of the best way down the left facet and one other 1/3-length zipper on the precise. When each are unzipped, you may stick your arms out the edges whereas nonetheless carrying the hood, which is nice on chilly mornings if you need to cook dinner meals however keep inside your bag to stay heat (There are snaps on the high of every zipper to maintain the edges from falling down.) We additionally just like the shorter shoulder zipper as a air flow possibility if you need to average your torso’s temperature.

The longer of the 2 zippers works completely. Sea-to-Summit makes use of a particular two-way YKK snag-free zipper, and the material sides are taped to forestall snagging. The issue is the brief zipper on the opposite facet of the bag. Whereas it’s also a two-way zipper, there isn’t a stopper to forestall the sliders from coming off if you unzip the zipper (particularly if you pull the highest slider right down to open the zipper). We will’t inform whether or not it is a manufacturing defect or by design. However in both case, it means that you could’t reliably shut this zipper as soon as the sliders come off with out having to reseat them…which is devilishly troublesome to do from contained in the bag.

The Spark Pro Down Sleeping bag has two upper zippers
The Spark Professional Down Sleeping bag has two higher zippers, so you may prolong your arms whereas nonetheless carrying the hood or vent the bag from both facet.

Think about the next situation: You’re too heat, so that you open the brief zipper all the best way, and the sliders, unknown to you as a result of it’s darkish and also you’re half unconscious, fall off the zipper. A number of hours later, you go to shut the zipper as a result of your physique has cooled, nothing occurs, and also you’re caught with a gaping gap that’s leaking chilly air into your bag. So that you get out your headlamp, get out of the bag, fiddle with the sliders to reseat them, shut the zipper once more, get again into your bag, and attempt to get again to sleep…fuming the way you’re going to return this sleeping bag to REI or another retailer as a result of it sucks.

The sliders come off when you open the short zipper. The sliders are also small and difficult to reseat.
The sliders come off if you open the brief zipper. The sliders are additionally small and troublesome to reseat.


Whereas we are able to perceive Sea-to-Summit’s want to create an Uber sleeping bag with temperature regulation options for all conditions, we query whether or not placing three zippers on one sleeping bag is simply asking for bother. Zippers are sometimes the largest level of failure in any piece of out of doors clothes or gear. In any occasion, for those who put zippers on a sleeping bag, you need them to work with a minimal of problem or upkeep for the lifetime of the sleeping bag. We will’t advocate the Spark Professional Down 30 sleeping bag because of the points we encountered with the brief zipper. It’s too dangerous as a result of this might be an superior sleeping bag in any other case.

Store at REI


Disclosure: Sea-to-Summit donated a sleeping bag for overview.

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