Fresh Goods Sunday - Boardman Super Light Inner Tubes

I noticed these tubes were in the sale when Angus was looking for some spanners for work. I have seen them before but never tried them as Angus was getting a good deal on the Halfords own branded tubes. The weekend we bought them there was another 20% off then Top Cash Back and some BCF discount in store so they worked out at 47p each! so we bought the only sizes / stock left in the Durham store- 2no x 26", 1no x 29" and 4no x 27.5". No road/touring/cx 700c sizes left.
The customer reviews on the Halfords site are not the best so fingers crossed they are ok, but if they are not they will be binned, sorry recycled. I have not tried one out yet but the next time I need to fit a new tube I will try one out and let you know how it gets on.
Manufacturers Blurb -
Boardman  Presta Bike Inner Tube
The Boardman Presta Bike Inner Tube is a lightweight and high performance inner tube from the top cycling brand Boardman. Boardman are all about high quality, top performance and attention to detail, and their inner tube range is certainly no exception to this rule.
RRP £5 each.

how is the 29" the same weight as a 26" ?

comparison tubes weight

no threaded valve so no washer.