Sleeping bag closure

An article comprising:

• (a) a quilt usable as a sleeping bag and having (i) a quilt inner surface, (ii) a quilt outer surface, (iii) a headward quilt top edge, (iv) a footward quilt bottom edge, (v) a first quilt lateral edge, and (vi) a second quilt lateral edge opposite the first quilt lateral edge;
• (b) first and second pairs of discrete, mating bottom fastener elements attached to the quilt along the quilt bottom edge and structurally arranged so that (i) only one discrete bottom fastener element of the first pair is positioned between the discrete bottom fastener elements of the second pair, (ii) only one discrete bottom fastener element of the second pair is positioned between the discrete bottom fastener elements of the first pair, and (iii) the first and second pairs of bottom fastener elements thereby define a first quilt bottom edge lateral segment between the first pair of bottom fastener elements but not between the second pair of bottom fastener elements, a second quilt bottom edge lateral segment between the second pair of bottom fastener elements but not between the first pair of bottom fastener elements, and a quilt bottom edge central segment between both pairs of bottom fastener elements;
• (c) an inner set of one or more quilt fastener elements attached to the quilt inner surface along at least a portion of a linear or curved inner quilt attachment path that extends from the first quilt lateral edge to the first quilt bottom edge lateral segment and defines on the quilt inner surface an inner quilt-overlap areal segment bounded by the inner quilt attachment path, the quilt bottom edge, and the first quilt lateral edge;
• (d) an outer set of one or more quilt fastener elements attached to the quilt outer surface along at least a portion of a linear or curved outer quilt attachment path that extends from the second quilt lateral edge to the second quilt bottom edge lateral segment and defines on the quilt outer surface an outer quilt-overlap areal segment bounded by the outer quilt attachment path, the quilt bottom edge, and the second quilt lateral edge;
• and
• (e) a draw cord engaged with the quilt bottom edge,
• wherein:
• (f) the inner and outer sets of quilt fastener elements and the inner and outer quilt attachment paths are structurally arranged so that, with the quilt wrapped in an overlapping footbox-wrapped arrangement, (i) the outer quilt-overlap areal segment faces a portion of the quilt inner surface, (ii) the inner quilt-overlap areal segment faces a portion of the quilt outer surface, (iii) each quilt fastener element of the inner set is substantially aligned with a corresponding, mating quilt fastener element of the outer set, and (iv) engagement of the corresponding mating quilt fastener elements of the inner and outer sets with each other retains at least a footward portion of the quilt in the overlapping footbox-wrapped arrangement;
• (g) with the quilt wrapped in the overlapping footbox-wrapped arrangement, (i) the first pair of mating bottom fastener elements is positioned so as to engage each other, (ii) the second pair of mating bottom fastener elements is positioned so as to engage each other, and (iii) engagement of the first pair of bottom fastener elements with each other and engagement of the second pair of bottom fastener elements with each other retain at least the quilt bottom edge in the overlapping footbox-wrapped arrangement with the first and second quilt bottom edge lateral segments overlapping each other;
• and
• (h) the draw cord and the quilt are structurally arranged so that, with the quilt retained in the overlapping footbox-wrapped arrangement by engagement of the first pair of bottom fastener elements with each other, engagement of the second pair of bottom fastener elements with each other, and engagement of the corresponding quilt fastener elements of the inner and outer sets with each other, pulling the draw cord gathers the quilt bottom edge to form a closed footbox of the sleeping bag.