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+Roll Top Backpack
+=================
+
+.. only:: html
+
+   .. contents::
+
+.. figure:: roll_top_backpack_front.jpg
+   :align: center
+
+This is a simple backpack with a roll top closure.
+
+The pictures show this backpack as being sewn completely by hand: this
+was because of some specific constraints of the project (mentioned in
+the blog post), and it shows that MYOG as a hobby can be accessible even
+when lacking a sewing machine.
+
+Most of the constructions could of course be done by machine, but
+in that case I think it would be easier to bind the raw edges instead of
+felling them, and using the variant with box corners instead of a
+separate bottom. Attaching the leather-ish protection to the bottom
+needs to be done by hand, however.
+
+Materials
+---------
+
+Fabric
+^^^^^^
+
+* 1 m outer fabric (e.g. waxed canvas);
+* 1 m lining fabric (e.g. lighter canvas);
+* 30 cm leather-like material for reinforcements.
+
+Notions
+^^^^^^^
+
+* 2.1 m 25 mm webbing;
+* 1.6 m 50 mm webbing;
+* 4 50 mm D-rings;
+* 2 25 mm D-rings;
+* glue suitable for the leather-like material;
+* strong sewing thread;
+
+Pattern
+-------
+
+Download the pattern from :download:`roll_top_backpack.val`.
+
+The file is set up to only print the pattern pieces for the bottom,
+strap support and webbing cover, also available as a tiled PDF in A4
+format: :download:`roll_top_backpack-A4.pdf`; everything else are just
+rectangles, and their measurements can be taken from the Variables Table
+in valentina.
+
+Instructions
+------------
+
+Cutting
+^^^^^^^
+
+Cut all pieces as indicated on the patter, either the basic pieces or
+the ``bc`` variants if making the `Box Corners`_ variant.
+
+Back preparation
+^^^^^^^^^^^^^^^^
+
+.. note:: Optionally add a molle pattern to the back, to be able to
+   attach some removable padding.
+
+   .. figure:: 0200-molle_back.jpg
+      :align: center
+
+   Cut 7 pieces of 25 mm webbing as wide as the back (including
+   allowances); starting 6.5 cm from the base put them at one webbing
+   width of distance from each other over the bottom back piece.
+
+   Mark a line in the center, and lines at every 4 cm on each distance, and
+   sew, backstitching over each piece.
+
+   If desired, sew similar pieces of webbing to the lower part of the
+   other panels.
+
+.. figure:: 0201-webbing_straps.jpg
+   :align: center
+
+Cut 2 pieces of 50 mm webbing 80 cm long, fold them in half and slide
+two wide D-rings in each of them. Sew them in place as close to the
+D-ring as possible.
+
+.. figure:: 0202-whipstitch_straps.jpg
+   :align: center
+
+Optionally whipstitch or topstitch the edges of the webbing, making them
+a single strap of double thickness.
+
+.. figure:: 0203-sewing_shoulder_strap.jpg
+   :align: center
+
+Sew the webbing pieces to the allowance at the top of the bottom back
+piece, at 4 cm from the center.
+
+.. figure:: 0204-sewing_closure_strap.jpg
+   :align: center
+
+Cut a piece of 25 mm webbing, 70 cm long, sew it to the allowance at the
+top of the bottom back piece, right at the center.
+
+.. figure:: 0205-strap_support_preparation.jpg
+   :align: center
+
+Cut two pieces of 25 mm webbing, 70 cm long, put them on each strap
+support so that one edge goes from one corner to the middle of the long
+side and there are 5 cm of webbing beyond the long side.
+
+.. figure:: 0206-strap_support_sewing.jpg
+   :align: center
+
+Fold the strap support in half, right sides facing, and sew at 1 cm from
+the long edge.
+
+.. figure:: 0207-strap_support_topstitching.jpg
+   :align: center
+
+Turn inside out, topstitch all around the webbing.
+
+.. figure:: 0208-attaching_strap_support.jpg
+   :align: center
+
+Put the strap support on top of the bottom back, 5 cm from the bottom,
+with the webbing facing up, and sew in the allowance.
+
+Trim the excess webbing.
+
+.. figure:: 0209-sewing_back_pieces.jpg
+   :align: center
+
+Right sides together, put the top back piece over the bottom back and
+sew. Press the allowances up.
+
+Front preparation
+^^^^^^^^^^^^^^^^^
+
+.. figure:: 0301-preparing_front_closure.jpg
+   :align: center
+
+Cut 10 cm of 25 mm webbing, put two D-rings in it, fold it in half and
+sew as close to the rings as possible.
+
+.. figure:: 0302-whipstitching_front_closure.jpg
+   :align: center
+
+Optionally whipstitch the two sides.
+
+.. figure:: 0303-front_closure_placement.jpg
+   :align: center
+
+Put it in the center of the front piece, in such a way that the top
+of the D-rings aligns just below the level of the seam in the back.
+
+.. figure:: 0304-sewing_front_closure.jpg
+   :align: center
+
+Sew a 2 cm × 2 cm square at the bottom of the webbing, plus diagonals
+for strength.
+
+.. figure:: 0305-webbing_cover_front.jpg
+   :align: center
+
+Put the webbing cover so that it covers the square seam and the raw ends
+of the webbing, and appliquestitch it in place.
+
+Structure
+^^^^^^^^^
+
+.. figure:: 0401-back_over_back_lining.jpg
+   :align: center
+
+Put the back over the back lining, wrong sides together, aligning it at
+the bottom edge, centering it between the side edges so that there is 1
+cm of lining excess on each side, and making sure that at the top the
+back is 2 cm longer than the lining.
+
+.. figure:: 0402-side_and_lining_over_back.jpg
+   :align: center
+
+Put one side lining on top of one side, aligned at the bottom and with 2
+cm of excess side compared to the lining.
+Put the side on top of the back, outer / fabric sides together, aligning
+the side of the side with that of the back outer.
+
+.. figure:: 0403-sewing_side_seam.jpg
+   :align: center
+
+Sew the side seam at 2 cm from the back lining edge (i.e. 1 cm from
+every other edge).
+
+.. figure:: 0404-felling_side_seam.jpg
+   :align: center
+
+Press the seam open, then press the allowance of the back lining in
+half, press the seam towards the side and fell.
+
+Repeat with the other side.
+
+.. figure:: 0405-sewing_front_side.jpg
+   :align: center
+
+Put the front on top of one side, right sides together and aligned at
+the bottom and side edge, put the front lining on top of everything,
+with right side on top, and aligned at the bottom and so that there is 1
+cm of excess of lining on the side. Sew at 2 cm from the edge.
+
+.. figure:: 0406-felling_front_side.jpg
+   :align: center
+
+Fell the seam.
+
+.. tip:: you can slide a metal ruler between the side and the side
+   lining to help you fell the seam without catching the outer fabric.
+
+.. figure:: 0407-aligning_other_front_side.jpg
+   :align: center
+
+Repeat for the other side of the front.
+
+.. figure:: 0410-attaching_bottom.jpg
+   :align: center
+
+With the body still inside out, put the outer base on the base lining,
+wrong sides together, so that the outer is centered on the lining.
+Starting from the corners put the base in the body, aligning the edges of
+the body with the edge of the outer base and taking care to keep the
+corners neat. Sew at 2 cm from the base lining edge.
+
+.. figure:: 0411-felling_base.jpg
+   :align: center
+
+Press the seam towards the sides and fell, trying to fold the corners
+as neatly as you can.
+
+.. figure:: 0412-hemming_top_opening.jpg
+   :align: center
+
+Fold down the fabric at the top towards the lining, twice, forming a
+hem, hemstitch it in place.
+
+Reinforcements
+^^^^^^^^^^^^^^
+
+Cut three rectangular pieces of reinforcement material, 3 cm wide and 2
+cm tall, fold them in half and sew them over the end of the straps.
+
+.. figure:: 0502-glued_bottom_reinforcement.jpg
+   :align: center
+
+Cut the bottom piece F out of reinforcement material, glue the side tabs
+closed to form a parallelepipedal open on the top.
+
+.. figure:: 0503-sewing_bottom_reinforcement.jpg
+   :align: center
+
+Applique-stitch the reinforcement to the bottom of the backpack, making
+sure to only catch the fabric and not the lining.
+
+.. tip:: depending on the material this reinforcement could be glued to
+   the backpack instead of being sewn, but this would make it harder to
+   change it later in case it was ruined from use.
+
+Variants
+--------
+
+Bound raw edges
+^^^^^^^^^^^^^^^
+
+Instead of flat-felling the raw edges, you can cut every piece with the
+same sewing allowance of 1 cm, sew the pieces as instructed and then
+bind the raw edges with bias or straight tape.
+
+Box corners
+^^^^^^^^^^^
+
+Instead of a separate bottom you can make the front and back pieces
+longer and add a seam at the center of the bottom; this will make the
+bottom of the pack a bit less structured, but can be significantly
+easier to sew.
+
+To do so, instead of pieces A, A1, B and D1 cut the pieces Abc, A1bc,
+Bbc and D1bd, and skip piece E and E1.
+
+Sew the sides of the backpack as instructed above, aligning the pieces
+from the top, when the instructions 
+
+Gallery
+-------
+
+.. figure:: roll_top_backpack_back.jpg
+   :align: center
+
+See Also
+--------
+
+* `The blog post where I describe planning and making this backpack
+  <https://blog.trueelena.org/blog/2025/07/25-roll_top_backpack_handsewn/index.html>`_